/* --- Modernización de AdminLTE v2 --- */

:root {
    --primary: #4e73df;
    --success: #1cc88a;
    --dark-sidebar: #1a202c;
    --content-bg: #f8f9fc;
    --radius: 12px;
    --shadow: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.1);
}

/* 1. Fondo y Cuerpo */
body, .content-wrapper {
    background-color: var(--content-bg) !important;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

/* 2. Barra Superior (Navbar) */
.main-header .navbar {
    margin-left: 230px;
    background: var(--primary) !important;
    box-shadow: 0 2px 4px rgba(0,0,0,0.04);
    border-bottom: 1px solid #e3e6f0 !important;
}

.main-header .logo {
    background-color: var(--primary) !important;
    font-weight: 700;
    letter-spacing: 1px;
}

/* 3. Menú Lateral (Sidebar) Moderno */
.main-sidebar {
    background-color: var(--dark-sidebar) !important;
    box-shadow: 4px 0 10px rgba(0,0,0,0.05);
}

.sidebar-menu > li > a {
    margin: 5px 10px;
    border-radius: var(--radius);
    transition: all 0.3s ease;
}

.sidebar-menu > li:hover > a, 
.sidebar-menu > li.active > a {
    background: rgba(255, 255, 255, 0.1) !important;
    color: #fff !important;
    border-left: 0 !important; /* Quita la barra lateral vieja */
}

/* 4. Tarjetas (Box/Cards) más limpias */
.box {
    border-radius: var(--radius);
    border-top: 3px solid var(--primary);
    box-shadow: var(--shadow);
    border-left: 0;
    border-right: 0;
    border-bottom: 0;
}

/* 5. Inputs y Botones Redondeados */
.form-control {
    border-radius: 8px !important;
    border: 1px solid #d1d3e2;
    padding: 7px 15px;
}

.btn {
    border-radius: 8px !important;
    font-weight: 600;
    padding: 8px 16px;
    text-transform: uppercase;
    font-size: 12px;
}

/* 6. Optimizaciones para Mobile (< 767px) */
@media (max-width: 767px) {
    .main-header .navbar {
        margin-left: 0;
    }
    
    .content-wrapper {
        padding-top: 20px;
    }
    
    .sidebar-open .content-wrapper {
        transform: translate(230px, 0);
        filter: blur(2px); /* Efecto moderno al abrir menú */
    }
}